Results 91 to 100 of about 259,881 (379)

Cerebral blood flow velocity progressively decreases with increasing levels of verticalization in healthy adults. A cross-sectional study with an observational design

Frontiers in Neurology, 2023
BackgroundAutoregulation of the cerebral vasculature keeps brain perfusion stable over a range of systemic mean arterial pressures to ensure brain functioning, e.g., in different body positions. Verticalization, i.e., transfer from lying (0°) to upright (
Julian Deseoe, Anne Schwarz, Theodor Pipping, Aurelia Lehmann, Janne M. Veerbeek, Janne M. Veerbeek, Andreas R. Luft, Susanne Wegener, Christoph Globas, Jeremia P. O. Held, Jeremia P. O. Held   +10 more
doaj   +1 more source

EFFECTS OF 2% ENFLURANE ON INTRACRANIAL PRESSURE AND CEREBRAL PERFUSION PRESSURE [PDF]

British Journal of Anaesthesia, 1983
Ten patients with cerebral tumours were anaesthetized with thiopentone, 70% nitrous oxide in oxygen and fentanyl. Ventilation was controlled to give mean PaCO2 4.8 (range 3.6-6.7) kPa. Enflurane 2% was administered and ICP and MAP were recorded continuously for 10-15 min. The changes in ICP were not significant and ranged from -18.5 to 5.5 mm Hg. There
E, Moss, N M, Dearden, D G, McDowall
openaire   +2 more sources

Subventricular Zone‐on‐a‐Chip: A Model to Study Neurogenesis Disruption in Neonatal Intraventricular Hemorrhage

Advanced Science, EarlyView.
A human subventricular zone‐on‐a‐chip is developed to model intraventricular hemorrhage (IVH) in preterm infants. This platform enables the study of inflammation‐driven neurogenic disruption. Exposure to hemorrhagic cerebrospinal fluid and red blood cell lysate activated inflammatory pathways, with IL1B emerging as a key mediator.
Laura Nicoleti Zamproni, Begüm Gökçe, Magnus Gram, Coco Holliday, Aylin Sendemir, Marimélia Aparecida Porcionatto, Anna Herland   +6 more
wiley   +1 more source

Monro-Kellie 2.0: The dynamic vascular and venous pathophysiological components of intracranial pressure [PDF]

, 2016
For 200 years, the ‘closed box’ analogy of intracranial pressure (ICP) has underpinned neurosurgery and neuro-critical care. Cushing conceptualised the Monro-Kellie doctrine stating that a change in blood, brain or CSF volume resulted in reciprocal ...
Wilson, MH
core   +1 more source

Circular RNA PTPN4 Contributes to Blood‐Brain Barrier Disruption during Early Epileptogenesis

Advanced Science, EarlyView.
Epileptic condition induces CircPTPN4 upregulation, which promotes ECE‐1 expression through competitive sequestration of miR‐145a‐5p. The elevated ECE‐1 catalyzes the ET‐1 production, leading to p38/MAPK pathway activation and subsequent downregulation of tight junction protein expression. This cascade results in increased BBB permeability and enhanced
Jiurong Yang, Yang Hu, Feiyu Wang, Xintao Peng, Honggang Qi, Yuanyuan Yao, Canyu Zhang, Lijie Zhou, Xuemei Liang, Kang Xu, Cong Zhang, Aifeng Zhang, Chen Chen, Yu Zeng, Chenchen Zhang, Guangming Gan, Xinjian Zhu   +16 more
wiley   +1 more source

Clinical Application of Near-Infrared Spectroscopy in Neonates [PDF]

Neonatal Medicine, 2019
The incidence of cerebral palsy has not decreased despite advances in neonatal care. Preterm infants are at a high risk of cerebral palsy. Moreover, preterm infants might experience permanent neurological sequelae due to injury in the preterm brain ...
Ga Won Jeon
doaj   +1 more source

Potentiating Cerebral Perfusion Normalizes Glymphatic Dynamics in Systemic Inflammation

Advanced Science, EarlyView.
LPS‐induced systemic inflammation increases glymphatic influx but delays cervical lymphatic drainage, accompanied by AQP4 depolarization and impaired glymphatic clearance. Enhancing cerebral blood flow via the inotropic agent levosimendan effectively restored AQP4 polarization, improving glymphatic flux and amyloid‐β clearance.
Ruoyu Zhao, Bin Sun, Pengju Wei, Yingying Sun, Qianyan He, Kejia Zhang, Jun Lu, Shoujun Zhu, Yi Yang, Zhenni Guo   +9 more
wiley   +1 more source

Cerebral perfusion in patients with arterial hypertension and chronic vascular pathology of the brain

Терапевтический архив, 2003
Aim. To examine cerebral perfusion in patients with dyscirculatory encephalopathy and residual disorders of cerebral circulation in arterial hypertension. Material and methods.
L A Geraskina, Z A Suslina, A V Fonyakin, Т N Sharypova   +3 more
doaj  

Cerebral vasoreactivity in response to a headof-bed position change is altered in patients with moderate and severe obstructive sleep apnea [PDF]

, 2018
Obstructive sleep apnea (OSA) can impair cerebral vasoreactivity and is associated with an increased risk of cerebrovascular disease. Unfortunately, an easy-to-use, non-invasive, portable monitor of cerebral vasoreactivity does not exist. Therefore, we
Blanco, Igor, Cotta, Gianluca, Durduran, Turgut, Fortuna Gutiérrez, Ana Mª, Giovannella, Martina, Gregori-Pla, Clara, Mayos, Mercè, Mola, Anna, Universitat Autònoma de Barcelona, Zirak, Peyman   +9 more
core   +4 more sources

Tie2‐Dependent Mechanisms Influence Leptomeningeal Collateral Dynamics and Reperfusion Following Stroke

Advanced Science, EarlyView.
This work demonstrates that endothelial EphA4 limits Tie2 activation and curbs leptomeningeal collateral expansion after ischemic stroke. Pharmacological activation of Tie2 by an Ang‐1 mimetic or genetic loss of EphA4 stimulates collateral vessel growth, improves cerebral perfusion, and enhances neurological recovery.
Alexandra M. Kaloss, Caroline de Jager, Kennedie Lyles, Nathalie A. Groot, Jackie Zhu, Yu Lin, Michael Chen, Hehuang Xie, John B. Matson, Michelle H. Theus   +9 more
wiley   +1 more source